Victoria Siegel, the 18-year-old daughter of David and Jackie Siegel, was battling an addiction to prescription medication prior to her June 6 death, a rep for the family confirmed to Us Weekly via a statement on Monday, June 8.

“The Siegel family is devastated and heartbroken by the loss of their beloved Victoria, age 18. They are hurt, deeply wounded and they are grieving. Victoria was a beautiful spirit with a wonderful smile who was greatly loved, and will be deeply missed. Victoria had a history of seizures and was prescribed medication for this condition,” family spokesman Michael Marder’s statement reads. “Unfortunately she became dependent and struggled with this condition. She voluntarily underwent rehabilitation and was working hard to address this problem.”

Marder’s statement went on to note that the family was away at a wedding over the weekend, and that Victoria was found by the housekeeper around 2 p.m. Saturday.

“While an autopsy has been performed the cause of death has not been determined. It is likely that Victoria ingested one or more drugs prior to her death, however, we cannot determine at this time whether or not the drugs she took were in fact prescribed medication, something else, or where and how these drugs may have been obtained,” he continued.

Marder’s statement adds that the investigation is ongoing and the family is still awaiting the results of a toxicology report. “The family is deeply appreciative of the outpouring of support that they have received and request that their privacy be respected while they mourn their loss,” his statement concluded.

As previously reported, a cause of death could take eight to 12 weeks to be determined.

Victoria’s mom, Jackie Siegel, confirmed the tragic news on her Facebook on Sunday, June 7. "It is with great sadness that we ask you to respect our privacy during this tragic time and the loss of our beloved daughter, Victoria. Thank you all for your prayers and for your support," she wrote. "As more information comes out the family will share it, until that time there is no comment."

Victoria her family were featured in documentary The Queen of Versailles.